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Questions tagged [motor]

An electrical actuator that converts electrical energy into rotational motion or sustained linear motion (linear motor). There are many types of electric motors. If the specific type of motor is known, it is helpful to use or add a more specific tag, such as dc-motor, brushless-dc motor or induction-motor.

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Need Wiring Help For Aircon Blower Fan

I have an older working aircon with a broken control-board. Replacing the control-board is not worth the cost for this older unit. I am attempting to wire it as a simple "on/off" fashion. Where I ...
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Using analog hall effect sensor with a non-inverting schmitt trigger

I have an analog hall effect sensor that I want to convert to digital by using a non-inverting schmitt trigger. The issue I am facing is that when I connect the output of the hall sensor to the ...
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2answers
129 views

What does 9 V mean in 9 V motor?

Does it mean that you need 9 V to make the motor start, or is this the max voltage before it is damaged?
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438 views

DC motor temporary speed change with simple Boost Converter

I would like to know is if it is possible to give a slight voltage change to a dc motor with simple electronic items. Meaning that the voltage would normally be a set amount (10v) but would either ...
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1answer
48 views

Motor/MOSFET Does NOT React To Input On Breadboard

So I have tried so many different variations on breadboard of this circuit but the motor seems to just be powered by the power rail on breadboard. It does not react to any change in the input and ...
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5answers
131 views

15% drop in motor RPM when using PWM controller

I'm new to the forum and a total noob to electrical engineering. I have a 120W, 24V DC gear motor. Runs at ~200 RPM no load connected straight to a 24V power supply. However, when I connect it to ...
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1answer
107 views

PWM signal is affected when motor is connected

I am working on a fun side project where I am creating a PWM waveform using the LM324 and a small solar panel. I am using the LM324 for the astable multivibrator, integrator, and comparator. The ...
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1answer
134 views

I found a motor/generator thing at my school's storage. I was wondering if anyone could identify it

Im not sure what this is because it has both a commutator and a stator. It didnt have anything else with it. Im guessing it has something to do with ac generation.
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1answer
38 views

Sizing a motor for a conveyor

There is a plethora of information on motor sizing on the internet discussing the rated voltage, current, torque and power of the motor, and how these parameters should be selected based on the load ...
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1answer
40 views

Synchronous motor high starting current

I have Danaher Motion SS451 (120V, 60 Hz, Single Phase, 72 RM, page 10 in manual below) synchronous motor that was consistently blowing a 3 amp fuse. I replaced it with 5 amp slow-blow fuse and ...
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1answer
126 views

Compatible driver motor for JGA25-370

I'm new to electronics so i came here to ask some questions : 1) i have 4 motors JGA25-370 (6v, 58rpm) and 2 driver motors L298N ; If i put one drive to control 2 motors i will have max torque from ...
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0answers
59 views

Modeling scalar control of PMSM

I have met with a scalar control algorithm for a permanent magnet synchronous motor. I haven´t heard about it before so I decided to develop a dynamic model to further analyze this control algorithm. ...
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33 views

Is it appropriate to use the TB6621 or DRV8871 motor driver for powering 12V 1 amp motors?

I'm looking to make an Arduino powered rock crawler with 4 motors (want independent control of each wheel, also need to reverse). I'm looking into buying 12V DC motors that seem to have about a 1A ...
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2answers
112 views

Dc Motor circuit

I am making a motor control circuit for my model plane engine. It has to start slowly and climb to its full power and stop slowly like a jet engine fan. I saw a video on YouTube called 'super ...
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1answer
43 views

DIY 3-phase fast linear actuator

I have a need for a FAST linear actuator of which I may control position and speed reliably. I have already been looking into pnuematics, however it does not seem that this will fit my needs (I am ...
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1answer
40 views

Igus Motor Power Supply [on hold]

For my work I have to install a linear screw motor from the company Igus. It will be control with the constructor controller Dryve D1 (Dryve D1 Doc). I understood how to connect the motor, the ...
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1answer
61 views

Mechanical to electric to mechanical… Power loss to expect

I have a 3hp lawnmower engine. My engine hypothetical rpm range from 3k to 6k. If I was to connect it to a generator or motor with similar power rating at similar top rpm, lets say a 2000 watts ...
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2answers
90 views

Powering a 3 Phase 230VAC Motor with 28 12V Batteries wired in Series

Mechanical Engineering student here. I'm a part of a senior project team that trying to run a 40 HP 230 VAC three phase motor with a 40 HP VFD for a hydraulic pump. Our plan is to wire 28 Lead Acid ...
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1answer
31 views

Thermistor motor protection relay for thermal protection

In some of my induction motors PTC thermistor is available for thermal protection which will be integrated to thermistor motor protection relay. There are three PTC thermistors connected in series in ...
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2answers
61 views

How will electromotor intended for 460V be affected by working on an installation on 440V?

How will an electromotor 150HP, 2-pole, intended for 460V, 60Hz, 3510 RPM, 197 AMP be affected by working on an installation where 440V/60Hz is the voltage? With regards to number of revolutions and ...
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1answer
64 views

Current limiting a starter motor

I'm planning to try to build an electric go-kart. My idea was to use a 12V starter motor from a car to power it, since used ones are fairly cheap and easy to get. (I already have 2 of them to ...
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0answers
19 views

permanent magnet synchronous motor Lagrangian in qd0 frame

I'm trying to derive a symplectic model for a permanent magnet synchronous motor (PMSM) in the rotating qd0 reference frame using a geometric integrator. For that purpose, I need the discrete-time ...
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60 views

Motors for high precision application

I am designing a pan-tilt system. For pan system, we required overall tracking accuracy of 0.1° for given speed profile below. (Max tracking rate: 2 degree/sec, max acceleration: 0.15°/sec² and max ...
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3answers
785 views

Why is there a resistor inline with switch in blender motor?

Our hand-held blender stopped working and I took it apart to see if I could fix it (no, as it turned out). The circuit was simple; a switch and a 0.47 Ohm (R47) resistor in series with a full bridge ...
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1answer
43 views

Why does shorting the phases of a BLDC motor cause it to lock?

Normally a motor can be locked by shorting its phases. When the motor is not connected and we short all the the three phase terminals (tie them together) and try to rotate the shaft it offers lot of ...
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1answer
46 views

How do I add a bipolar stepper motor to this circuit? [closed]

I have just started electronics at school and cannot find any tutorials on how to do this. I am creating a circuit that when the light intensity increases a bipolar stepper motor will step clockwise ...
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1answer
136 views

starter motor field coil wrapping material

In my Land rover starter motor , the field coils are wrapped in cotton tape, I see that Egyption cotton tape is sold for this purpose, but I am told I can use rubber tape, will this interfere with any ...
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34 views

H Bridge with NMOS issues

I am designing an H-Bridge for my arduino board to control a dc motor with PWM signals. I have a few issues with my design: There is a spike current of 120A the first miliseconds of my simulation and ...
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2answers
27 views

How can I test a DC car blower motor with an external resistor?

How can I test a DC car blower motor with an external resistor? (note that there is an existing question about testing DC motors, but the assumption there is that it has an internal resistor, and it ...
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1answer
130 views

How to test phone vibrator motor?

I have a phone vibrator motor that I want to check. This is what it looks like: And here is the schematic from the service manual: The motor is not connected to the circuit. It is by itself as seen ...
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1answer
120 views

Control of electric hoist motor based on variable load

Is it possible to control the power of a hoist motor based on the specific load that will be lifted? What if the load is known by using a weight sensor?
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0answers
26 views

How to run 200 RPM motor on 5V Relay using NodeMCU?

The following circuit comprises of NodeMCU (ESP8266) which is intended to run a 200 RPM johnson motor. The circuit comprises of 5V Relay connected via Darlington pair using transistors. The circuit is ...
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1answer
30 views

Induction Motor Switching Surge

I would like to ask a question related with induction motor Whenever I switch ON & OFF a motor, a small voltage (3-8 V) produced at the metal surface where the motor is attached. I figure out ...
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2answers
782 views

Designing/Predicting Output from Permanent Magnet Motorcycle Stators

I'm hoping you can help me. I've long been into motorcycles, and have restored and customized many different bikes. While building custom motorcycles, I often add electrical accessories, and use high ...
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1answer
82 views

3-phase motor (hi-hp) fails on start, insulation was > 500 megohms. WHY? [closed]

This is a common situation in industry where the 3-phase motor has a resistive reactance fault (as small as 1% unbalance) PRIOR to start. Insulation has been subject to excessive heating but meets ...
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19 views

AC servo motor driver problem (new, more precise) [duplicate]

I was not precise in last question. My AC servo motor driver "panasonic MSDA023A1A" which I use on CNC cutting machine is started to display alarm code "Err_18", which stands for regenerative ...
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2answers
41 views

Question about AC servo motor driver

Does anyone know what means when AC servo motor driver displays error code for "regenerative discharge", and stops working. What this mean in practical situation. This happens from 1 to 10 minuts ...
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2answers
51 views

Permanent magnet synchronous motor (PMSM) equivalent circuit

I am trying to model a PMSM (permanent magnet synchronous motor) in LTspice and in order to do so I need to form an equivalent circuit. Through some research I believe the circuit should be formed in ...
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2answers
309 views

Limit MC-60 controller output

I am building a CNC engraver/Router. I have a Chinese 12-48 VDC, 400 W PM spindle. The spindle speed is from 3000 RPM at 12 V input to 12000 RPM at 48 V. I want to drive the spindle with a MC-60 ...
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3answers
1k views

Reduce EMI generated by old AC motor from an electric knife

I have an old electric knife (220V 50Hz) which seems to produce a lot of EMI. Some clues on that were a "bzzzz" noise from PC speaker I noticed sometimes when someone use it. Recently I bought a ...
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1answer
40 views

How to reduce inrush current for DC Motor in boom barrier gate application?

I'm using 24V 25W 100RPM DC geared motor for boom barrier gate application.So I added an overload protection for that circuit but whenever the motor starts the inrush current is produced and it ...
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3answers
106 views

Is there any way to obtain linear or angular distance proportional to a voltage signal?

If we have a programmable arbitrary function generator as a voltage signal source and if we are able to output any waveform like a sine or exponential decay as output voltage versus time; how can this ...
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0answers
32 views

What if voltage is decreased for an electrical fan (DC Motor)

Will the speed of rotation decrease or increase? I have an idea of Lorentz Force and all that. Use P=VI and V=IR to explain this to me please. I can't understand what will be the outcome of decreasing/...
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1answer
35 views

DC Motor Controller: hacking it bidirectional?

I just picked up two of these DC motor controllers (https://www.amazon.ca/Controller-Yeeco-Universal-0-01-1000W-Generator/dp/B00RZ97DDQ/ref=sr_1_10?dd=1QzB1w0bE3cxmYrmXew-NA%2C%2C&ie=UTF8&qid=...
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1answer
43 views

Calculate torque from current induced in a single phase of a 3 phase AC Induction servo motor

I'm looking to measure the torque or slip angle on an AC induction (asynchronous) servo motor given the current induced in one of its phases. The servo and drive is yaskawa. Example data is shown ...
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0answers
40 views

SVPWM for BLDC Motors: Switching Losses vs Neutral Point Voltage Swing/fluctuation

I am implementing a SVPWM (Space Vector Pulse Width Modulation) scheme for a 3-phase inverter (3 H-bridges, nothing fancy) to control a BLDC Motor. Since one can choose which zero vectors (000 or 111)...
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3answers
5k views

Finding number of pole pairs in a BLDC motor

I have a 3phase CDROM BLDC motor for which I don't have any datasheet. How can I find out the number of pole pair in the motor? Hint:-With a magnet, I could check that there are some N and S poles in ...
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1answer
28 views

Commutators and direction of current

I just read about commutators and their uses in motors and dynamos. While revising the topic I came across this question: According to me the answer should be (c). Because: In the above diagram of ...
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5answers
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Can a linear solenoid be as efficient as a brushed motor with a gearbox?

I've heard that linear solenoids are power-hungry and tend to overheat, especially if the stroke is long. Can a linear solenoid be as power efficient as a motor with a gearbox that converts rotary ...
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28 views

Grounding Multiple Devices

I am designing a motor controller with an Arudino, UBEC, and ESC. The Arduino will control Servo Motors and Brushless Motors. I want to make sure I understand how to hook up all the devices to avoid ...